cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_POSIX_THREAD_PROCESS_SHARED.c -o unistd/_POSIX_THREAD_PROCESS_SHARED -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lintl -liconv
unistd/_POSIX_THREAD_PROCESS_SHARED.c:4:2: error: #error "_POSIX_THREAD_PROCESS_SHARED is not defined"
    4 | #error "_POSIX_THREAD_PROCESS_SHARED is not defined"
      |  ^~~~~